Best Oatmeal Chocolate Chip Cookies

2 cups butter
2 cups brown sugar
2 cups granulated sugar
4 large eggs
2 teaspoons vanilla
2 teaspoons baking soda
2 teaspoons baking powder
2 teaspoons salt
4 cups flour
5 1/2 cups oatmeal
4 cups chocolate chips

Cream together the butter and sugars. Add eggs and vanilla. Beat until light and fluffy. Add Baking soda, powder, and salt and mix. Add flour, oatmeal and chocolate chips. Mix until combined. Bake at 350 degrees for 10-12 minutes.